1. David C. Burnham and Donald L. Weinberg. “Observation of Simultaneity in Parametric Production of Optical Photon Pairs”. In: Phys. Rev. Lett. 25 (2 July 1970), pp. 84–87. url: https://link.aps.org/doi/10.1103/PhysRevLett.25.84.
2. Vladimir Borisovich Berestetskii, Evgenii Mikhailovich Lifshitz, and Lev Petrovich Pitaevskii. Quantum Electrodynamics: Volume 4. Vol. 4. Butterworth-Heinemann, 1982.
3. Ihar Lobach. Quantum effects in undulator radiation: Proposed experiments and results of theoretical analysis. https://indico.fnal.gov/event/18978/. Budker Seminar, November 2018.
4. Ihar Lobach. Dirac-Volkov Model; Glauber’s Model; IOTA Experiment Ideas. https://indico.fnal.gov/event/18395/contributions/46989/. Workshop on Single-Electron Experiments in IOTA, November 2018.
5. A. A. Sokolov et al. “Two-photon synchrotron emission”. In: Soviet Physics Journal 19.9 (1976), pp. 1139–1144. url: https://doi.org/10.1007/BF00891463.